NAME¶

lttng-disable-event - Disable LTTng recording event rules

SYNOPSIS¶

Disable one or more recording event rules matching Linux kernel events:

lttng [GENERAL OPTIONS] disable-event --kernel


      [--tracepoint | --syscall | --probe | --function]


      (--all-events | NAME[,NAME]...)


      [--session=SESSION] [--channel=CHANNEL]

Disable one or more recording event rules matching user space tracepoint or Java/Python logging events:

lttng [GENERAL OPTIONS] disable-event


      (--userspace | --jul | --log4j | --python) [--tracepoint]


      (--all-events | NAME[,NAME]...)


      [--session=SESSION] [--channel=CHANNEL]

DESCRIPTION¶

The lttng disable-event command disables one or more enabled recording event rules previously created with the lttng-enable-event(1) command which belong to:

With the --session=SESSION option

Without the --session option

With the --channel=CHANNEL option

Without the --channel option

See lttng-concepts(7) to learn more about recording event rules.

As of LTTng 2.13.14, the disable-event command can only find recording event rules to disable by their instrumentation point type and event name conditions. Therefore, you cannot disable recording event rules having a specific instrumentation point log level condition, for example.

With the --kernel option and no instrumentation point type condition option, the disable-event command disables one or more Linux kernel recording event rules regardless of their instrumentation point type.

List the recording event rules of a given recording session and/or channel with the lttng-list(1) command.

Without the --all-events option, the disable-event command disables one recording event rule per NAME argument. NAME is the exact event name condition pattern of the recording event rule to disable, as listed in the output of lttng list (see lttng-list(1)).

You may disable an enabled recording event rule regardless of the activity (started or stopped) of its recording session (see lttng-start(1) and lttng-stop(1)).

See the “EXAMPLES” section below for usage examples.

OPTIONS¶

See lttng(1) for GENERAL OPTIONS.

EXIT STATUS¶

0

1

2

3

4

ENVIRONMENT¶

LTTNG_ABORT_ON_ERROR

LTTNG_HOME

LTTNG_MAN_BIN_PATH

LTTNG_SESSION_CONFIG_XSD_PATH

LTTNG_SESSIOND_PATH

FILES¶

$LTTNG_HOME/.lttngrc

$LTTNG_HOME/lttng-traces

$LTTNG_HOME/.lttng

$LTTNG_HOME/.lttng/sessions

/etc/lttng/sessions

Note

EXAMPLES¶

Example 1. Disable all Linux kernel tracepoint recording event rules in the default channel of the current recording session.

$ lttng disable-event --kernel --tracepoint --all-events

Example 2. Disable specific Apache log4j recording event rules in the default channel of a specific recording session.

$ lttng disable-event --session=my-session --log4j \


                      MySingleton,MyProxy,MyFacade

Example 3. Disable all user space recording event rules in a specific channel of the current recording session.

$ lttng disable-event --channel=my-channel --userspace \


                      --all-events

Example 4. Disable specific Linux kernel system call recording event rules in the default channel of the current recording session.

$ lttng disable-event --kernel --syscall pipe2,eventfd

RESOURCES¶

COPYRIGHT¶

This program is part of the LTTng-tools project.

LTTng-tools is distributed under the GNU General Public License version 2 <http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html>. See the LICENSE <https://github.com/lttng/lttng-tools/blob/master/LICENSE> file for details.

THANKS¶

Special thanks to Michel Dagenais and the DORSAL laboratory <http://www.dorsal.polymtl.ca/> at École Polytechnique de Montréal for the LTTng journey.

Also thanks to the Ericsson teams working on tracing which helped us greatly with detailed bug reports and unusual test cases.

SEE ALSO¶

lttng(1), lttng-enable-event(1), lttng-list(1), lttng-concepts(7)